Bird cage



FIG. 1 is a front elevational view of a bird cage embodying my new design;

FIG. 2 is an end elevational view taken from one end thereof;

FIG. 3 is a rear elevational view thereof, with a drawer of the cage shown in partly open position;

FIG. 4 is an elevational view taken from the end opposite that shown in FIG. 2;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

It is to be understood that the pattern is continuous throughout the area indicated in broken lines in FIGS. 1 through 4. 

The ornamental design for a bird cage, substantially as shown and described. 